Mobile platform for linear polyurethane polishing disc production line

Abstract

The utility model relates to a kind of mobile platform for linear polyurethane polishing disc production line, including long and narrow type's platform body, the top surface of platform body is set with several fixed hole groups along its length direction, every fixed hole group includes four cross holes arranged in rectangle, the cross hole is formed by the vertical intersection of two waist type holes;Roller is installed in the width direction of the bottom surface of platform body one side, the other side extends downward and forms the protrusion for guiding, the lowest of protrusion is flush with the lowest of roller;The side of the width direction of platform body is provided with clamping unit;The side of the width direction of platform body top surface is provided with leaning rod unit, the leaning rod unit with the fixed hole group one to one correspondence;Advantages are that: through movable platform, the movement of mould unit between each station is realized, worker or equipment on station is facilitated to work, production efficiency and automation degree are greatly improved, the degree of dependence on manual is reduced, and cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic tool parts manufacturing, and in particular to a mobile platform for a linear polyurethane polishing disc production line. Background Technology

[0002] A pneumatic polishing machine is a tool that uses compressed air as a power source and is widely used for polishing and grinding the surfaces of various materials such as metal, wood, and plastic. The pneumatic polishing disc is a component installed at the rotating end of the pneumatic polishing machine, such as... Figure 1 and Figure 2 As shown, the pneumatic polishing disc (also known as a polyurethane polishing disc) includes a base, a polyurethane layer, a hook and loop fastener layer, and a polishing or grinding layer. The back of the base is fitted with a connector for fixing to the rotating end of the pneumatic polishing machine. The front of the base forms a polyurethane layer through an ester injection and foaming process. A hook and loop fastener layer is adhered to the surface of the polyurethane layer to secure the polishing or grinding layer.

[0003] Currently, the production of these polyurethane polishing pads mainly relies on manual operation: after cleaning the mold (including the bottom mold and the top mold) and applying a release agent, a base is placed in the groove of the bottom mold; workers transport the bottom mold with the base to the ester injection equipment, where the equipment injects polyurethane material; then, Velcro is placed on the uncured material and the top mold is closed, and the entire mold is sent into an oven for heating and foaming; after foaming is completed and it cools naturally, the mold is opened and the preliminarily formed polishing pad is taken out. Finally, excess polyurethane scraps need to be manually trimmed and a polishing or grinding layer is pasted on (the pasting process can also be done by the user), completing the final assembly.

[0004] The aforementioned processing relies heavily on manual labor, which is detrimental to reducing product costs and expanding production scale. Therefore, the applicant intends to develop a linear polyurethane polishing disc production line to improve the automation level of polishing disc production. As a key component of the linear production line, the improvement and innovation of the moving platform is crucial; based on this, this application is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a mobile platform for a linear polyurethane polishing disc production line to improve the automation level of polishing disc production.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows:

[0007] A mobile platform for a linear polyurethane polishing disc production line includes a long and narrow platform body. The top surface of the platform body is provided with a plurality of fixing hole groups along its length direction. Each fixing hole group includes four cross holes arranged in a rectangular shape. The cross holes are formed by two waist-shaped holes intersecting perpendicularly.

[0008] A roller is installed on one side of the bottom surface of the platform body in the width direction, and the other side extends downward to form a protrusion for guidance. The lowest point of the protrusion is flush with the lowest point of the roller.

[0009] A clamping unit is provided on one side of the platform body in the width direction;

[0010] A support rod unit is provided on one side of the top surface of the platform body in the width direction, and the support rod unit corresponds one-to-one with the fixing hole group.

[0011] Furthermore, the support rod unit includes a support rod seat, a guide rod for lifting the support rod, a screw rod for lifting the support rod, a support rod body, and an upper fastening nut and a lower fastening nut. The support rod seat is fixed to the top surface of the mobile platform and has a guide hole and a mounting hole thereon.

[0012] The top end of the lifting screw for the support rod is fixed to the support rod body, and its bottom end passes through the mounting hole. The upper fastening nut and the lower fastening nut are threadedly connected to the lifting screw for the support rod and are located on the upper and lower sides of the mounting hole.

[0013] The top end of the guide rod for lifting the support rod is fixed to the support rod body, and its bottom end passes through the guide hole.

[0014] Furthermore, both ends of the mobile platform along its length are provided with shovels. The shovels are inclined and one end is fixed upward to the end of the mobile platform, while the other end extends downward and is flush with the lowest point of the roller.

[0015] Furthermore, the lower end of the shovel plate is wrapped with a rubber layer.

[0016] The advantages of this utility model are:

[0017] 1. The movable platform enables the mold unit to move between various workstations, facilitating the operation of workers or equipment at each workstation, greatly improving production efficiency and automation, reducing reliance on manual labor, and lowering costs;

[0018] 2. The mobile platform is equipped with shovels at both ends. During the reciprocating movement of the mobile platform, the shovels can pick up the foamed polyurethane that has fallen onto the top of the workbench and push it out of the workbench, thereby reducing the frequency of manual cleaning of the workbench. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of a polyurethane polishing disc in the background art;

[0020] Figure 2 for Figure 1 An explosion diagram;

[0021] Figure 3 This is a three-dimensional structural diagram of the linear polyurethane polishing disc production line in the embodiment;

[0022] Figure 4 This is a schematic diagram of the mobile platform on the workbench in the embodiment;

[0023] Figure 5 This is a three-dimensional structural diagram of the mobile platform from the top view in the embodiment;

[0024] Figure 6 for Figure 5 Enlarged diagram of part A in the diagram;

[0025] Figure 7 This is a three-dimensional structural diagram of the mobile platform from the bottom surface perspective in the embodiment;

[0026] Figure 8 for Figure 7 Enlarged schematic diagram of part B in the diagram;

[0027] Figure 9 This is a schematic diagram of the assembly of a single mold unit and part of the moving platform in the embodiment;

[0028] Figure 10 for Figure 9 A three-dimensional structural diagram from another perspective;

[0029] Figure 11 for Figure 9 A side view diagram.

[0030] Label Explanation

[0031] 1. Polyurethane polishing disc; 101. Base; 102. Polyurethane layer; 103. Velcro layer; 104. Connector; 2. Worktable; 201. Slide; 3. Moving platform; 301. Cross hole; 302. Backrest seat; 303. Guide rod for backrest lifting; 304. Screw for backrest lifting; 305. Backrest body; 306. Upper fastening nut; 307. Lower fastening nut; 308. Shovel plate; 309. Clamping unit; 310. Protrusion; 311. Roller; 4. Platform drive 401. Timing Belt; 402. Timing Pulley; 403. Drive Source; 5. Oven; 6. Mold Unit; 601. Base Plate; 602. Bottom Mold; 603. Cover Mold; 604. Magnet; 605. Iron Block; 606. Front Lower Support; 607. Front Lower Rotating Block; 608. Adjusting Stud; 609. Front Upper Rotating Block; 610. Front Upper Support; 611. Upper Fastening Nut; 612. Lower Fastening Nut; 613. Rear Lower Support; 614. Rear Rotating Block; 7. Ester Injection Machine. Detailed Implementation

[0032] The present invention will be further described in detail below with reference to the embodiments. It should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" etc. indicated by the accompanying drawings are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0033] This embodiment proposes a linear polyurethane polishing disc production line, such as... Figure 1 As shown, the system includes a workbench 2, a moving platform 3, an oven 5, and an injection molding machine 7. Both the workbench 2 and the moving platform 3 are elongated. The workbench 2, along its length, is sequentially configured with an operating station, an injection molding station, an operating station 2, and a heating station. The oven 5 is located at the heating station, and part of the workbench 2 is located inside the oven 5; the length of the workbench 2 inside the oven 5 is greater than the length of the moving platform 3. The injection molding machine 7 is located at the injection molding station and is situated on one side of the workbench 2 in the width direction. The moving platform 3 is slidably connected to the workbench 2, and a platform drive mechanism 4 is installed on the workbench 2 to drive the moving platform 3 to slide along the length of the workbench 2. Multiple mold units 6 are fixed on the moving platform 3, arranged along its length. When the mold unit 6 on the moving platform 3 moves to the injection molding station, the injection molding station injects polyurethane into the mold unit 6. The injection molding equipment in this embodiment uses existing equipment.

[0034] refer to Figures 9 to 11 The mold unit 6 includes a base plate 601, a bottom mold 602, and a cover mold 603. The base plate 601 is mounted on the top surface of the moving platform 3, the bottom mold 602 is fixed to the base plate 601, and the cover mold 603 is rotatably connected to the bottom mold 602. The cover mold 603 can be opened or closed by rotation under external force. Simultaneously, an iron block 605 is provided on the cover mold 603, and a magnet 604 for attracting the iron block 605 is provided on the bottom mold 602. After polyurethane injection, when the bottom mold 602 and the cover mold 603 are closed and heated, the polyurethane foam will generate a force that pushes open the cover mold. The attraction force of the magnet 604 increases the closing force of the bottom mold 602 and the cover mold 603, thereby ensuring the stability of the mold closing.

[0035] When mold unit 6 is placed horizontally and polyurethane liquid is injected, air is easily trapped in the gap between the liquid and the mold wall, forming bubbles. If these bubbles remain in the finished product, they will affect the quality and performance of the polishing pad. Experiments have shown that tilting the mold during ester injection helps the liquid polyurethane flow better and spread throughout the mold, and allows the liquid to contact the mold surface at a certain angle. This not only reduces the chance of air being trapped, but also makes it easier for the already formed microbubbles to rise and escape. Based on this, in this embodiment, one end of the base plate 601 is rotatably connected to the top surface of the moving platform 3, and the other end of the base plate 601 is provided with a lifting unit between it and the top surface of the moving platform 3. The lifting unit is used to lift the base plate 601, so that the base plate 601 is tilted at 10°-15° relative to the top surface of the moving platform 3. In this embodiment, the tilt angle is preferably 13°.

[0036] The rotating connection structure between the mold unit 6 and the moving platform 3 is as follows: it includes a rear lower support 613 and a rear rotating block 614. The rear lower support 613 is fixed on the top surface of the moving platform 3, the lower part of the rear rotating block 614 is rotatably connected to the rear lower support 613, and the upper part of the rear rotating block 614 is fixed to the bottom surface of the base plate 601.

[0037] Furthermore, the lifting unit includes a lower front support 606, a lower front rotating block 607, an adjusting stud 608, an upper front rotating block 609, an upper front support 610, an upper fastening nut 611, and a lower fastening nut 612. The lower front support 606 is fixed to the top surface of the moving platform 3. The lower front rotating block 607 is rotatably connected to the lower front support 606. The upper front support 610 is fixed to the bottom surface of the base plate 601. The upper front rotating block 609 is rotatably connected to the upper front support 610, and the upper front rotating block 609 is provided with a through hole. One end of the adjusting stud 608 is fixed to the lower front rotating block 607, and the other end passes through the through hole on the upper front rotating block 609. The upper fastening nut 611 and the lower fastening nut 612 are threadedly connected to the adjusting stud 608 and are located on the upper and lower sides of the upper front rotating block 609, respectively. The tilt angle of the mold unit 6 can be changed by adjusting the positions of the upper fastening nut 611 and the lower fastening nut 612.

[0038] Different models of polyurethane polishing discs require different models of mold units 6. To facilitate the position adjustment of different models of mold units 6 on the moving platform 3, such as... Figure 6 As shown, the top surface of the mobile platform 3 has a cross hole 301 corresponding to the front lower support 606 and the rear lower support 613. The cross hole 301 is formed by two oblong holes intersecting perpendicularly. By setting the cross hole 301, the position of the mold unit 6 in the front-back, left-right and right directions on the mobile platform 3 can be adjusted.

[0039] refer to Figure 5 and Figure 6The mobile platform 3 is located adjacent to the platform drive mechanism 4. When the mold unit 6 on the mobile platform 3 is in the open state, if the cover mold 603 is overturned, it will affect the operation of the platform drive mechanism 4. As an improvement, in this embodiment, the top surface of the mobile platform 3 is provided with a support rod unit corresponding to the mold unit 6. After the cover mold 603 is rotated open, it can rest against the support rod unit. The design of the support rod unit allows the mold unit 6 to be in a fixed-angle open state, which facilitates the operation of the operator and the injection of ester by the injection machine 7, while preventing it from being over-opened and affecting the platform drive mechanism 4 on the rear side.

[0040] Furthermore, to accommodate different models of mold unit 6, this embodiment sets the support rod unit as a height-adjustable structure. Specifically, the support rod unit includes a support rod seat 302, a support rod lifting guide rod 303, a support rod lifting screw 304, a support rod body 305, and an upper fastening nut 306 and a lower fastening nut 307. The support rod seat 302 is fixed to the top surface of the moving platform 3 and has a guide hole and a mounting hole. The top end of the support rod lifting screw 304 is fixed to the support rod body 305, and its bottom end passes through the mounting hole. The upper fastening nut 306 and the lower fastening nut 307 are threadedly connected to the support rod lifting screw 304 and are located on the upper and lower sides of the mounting hole. The top end of the support rod lifting guide rod 303 is fixed to the support rod body 305, and its bottom end passes through the guide hole; after the cover mold 603 is rotated open, it rests against the support rod body 305. The height of the support rod body 305 can be vertically adjusted by adjusting the positions of the upper fastening nut 306 and the lower fastening nut 307 to accommodate mold units 6 of different sizes.

[0041] Continue to refer to Figure 5 and Figure 6 The mobile platform 3 has shovels 308 at both ends along its length. These shovels 308 are angled, with one end fixed upwards to the end of the mobile platform 3 and the other end contacting the top surface of the workbench 2. The portion of the shovel 308 in contact with the workbench 2 is covered with a rubber layer. With shovels 308 at both ends of the mobile platform 3, during the reciprocating movement of the mobile platform 3, the shovels 308 can scoop up and push out any foamed polyurethane that falls onto the top surface of the workbench 2, thus reducing the frequency of manual cleaning of the workbench. The rubber layer design prevents the harsh noise produced when the metal workbench 2 surface scrapes against the metal shovels 308.

[0042] refer to Figure 4 and Figure 8The platform drive mechanism 4 includes a synchronous belt 401, synchronous pulleys 402, and a drive source 403. Multiple synchronous belts 401 are arranged along the length of the worktable 2, and the synchronous belt 401 is fitted onto multiple synchronous pulleys 402. The drive source 403 (in this embodiment, a servo motor) drives one of the synchronous pulleys 402 to rotate. A clamping unit 309, fixed to the synchronous belt 401, is provided on the mobile platform 3. The clamping unit 309 is a conventional structure consisting of two slotted clamping plates that can be bolted together to hold the synchronous belt in place. A protrusion 310 extends downwards on one side of the bottom width of the mobile platform 3, and a groove 201 that mates with the protrusion 310 is provided on the top surface of the worktable 2. A roller 311, contacting the top surface of the worktable 2, is provided on the other side of the bottom width of the mobile platform 3.

[0043] The workflow of this linear polyurethane polishing disc production line is as follows:

[0044] S1. The mobile platform 3 delivers the mold unit 6 to the first operating station. The operator at the first operating station opens the mold, so that the cover mold 603 rests against the support rod body 305, cleans the bottom mold 602 with a brush, and applies release agent to the bottom mold 602 and the cover mold 603. Finally, it is placed into the base.

[0045] S2. The mobile platform 3 delivers the mold unit 6 to the ester injection station, and the outlet of the ester injection machine 7 is aligned with the bottom mold 602 and polyurethane is injected into the bottom mold 602.

[0046] S3. The mobile platform 3 delivers the mold unit 6 to the second operating station. The operator at the second operating station covers the bottom mold 602, which is filled with polyurethane, with a layer of Velcro, and then closes the top mold 603.

[0047] S4. The mobile platform 3 sends the mold unit 6 into the oven 5 for heating and foaming. The temperature of polyurethane foaming is generally 35℃-40℃, and the foaming time is relatively short.

[0048] S5. After foaming is completed, the mobile platform 3 sends the mold unit 6 back to the operating station 1. The operator opens the mold and takes out the completed polyurethane polishing disc to proceed with the next round of production.

[0049] The above embodiments are only used to explain the concept of this utility model, and are not intended to limit the protection of this utility model. Any non-substantial modifications made to this utility model using this concept should fall within the protection scope of this utility model.

Claims

1. A mobile platform for a linear polyurethane polishing disc production line, characterized in that, The platform includes a long and narrow platform body. The top surface of the platform body is provided with several groups of fixing holes along its length. Each group of fixing holes includes four cross holes arranged in a rectangle. The cross holes are formed by two waist-shaped holes intersecting perpendicularly. A roller is installed on one side of the bottom surface of the platform body in the width direction, and the other side extends downward to form a protrusion for guidance. The lowest point of the protrusion is flush with the lowest point of the roller. A clamping unit is provided on one side of the platform body in the width direction; A support rod unit is provided on one side of the top surface of the platform body in the width direction, and the support rod unit corresponds one-to-one with the fixing hole group.

2. The mobile platform for a linear polyurethane polishing disc production line as described in claim 1, characterized in that, The support rod unit includes a support rod seat, a guide rod for lifting the support rod, a screw rod for lifting the support rod, a support rod body, and an upper fastening nut and a lower fastening nut. The support rod seat is fixed to the top surface of the mobile platform and has a guide hole and a mounting hole thereon. The top end of the lifting screw for the support rod is fixed to the support rod body, and its bottom end passes through the mounting hole. The upper fastening nut and the lower fastening nut are threadedly connected to the lifting screw for the support rod and are located on the upper and lower sides of the mounting hole. The top end of the guide rod for lifting the support rod is fixed to the support rod body, and its bottom end passes through the guide hole.

3. The mobile platform for a linear polyurethane polishing disc production line as described in claim 1, characterized in that, Both ends of the mobile platform along its length are provided with shovels. The shovels are inclined and one end is fixed upward to the end of the mobile platform, while the other end extends downward and is flush with the lowest point of the roller.

4. A mobile platform for a linear polyurethane polishing disc production line as described in claim 3, characterized in that, The lower end of the shovel is covered with a rubber layer.

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